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c5f0652367
The compiler has advanced enough that it is cheaper to convert to strings than to go through the assembly trampolines to call runtime.memequal. Simplify Equal accordingly, and cull dead code from bytealg. While we're here, simplify Equal's documentation. Fixes #31587 Change-Id: Ie721d33f9a6cbd86b1d873398b20e7882c2c63e9 Reviewed-on: https://go-review.googlesource.com/c/go/+/173323 Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Dave Cheney <dave@cheney.net> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
77 lines
1.1 KiB
ArmAsm
77 lines
1.1 KiB
ArmAsm
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "go_asm.h"
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#include "textflag.h"
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// memequal(p, q unsafe.Pointer, size uintptr) bool
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TEXT runtime·memequal(SB), NOSPLIT, $0-25
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Get SP
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I64Load a+0(FP)
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I64Load b+8(FP)
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I64Load size+16(FP)
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Call memeqbody<>(SB)
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I64Store8 ret+24(FP)
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RET
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// memequal_varlen(a, b unsafe.Pointer) bool
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TEXT runtime·memequal_varlen(SB), NOSPLIT, $0-17
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Get SP
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I64Load a+0(FP)
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I64Load b+8(FP)
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I64Load 8(CTXT) // compiler stores size at offset 8 in the closure
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Call memeqbody<>(SB)
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I64Store8 ret+16(FP)
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RET
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// params: a, b, len
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// ret: 0/1
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TEXT memeqbody<>(SB), NOSPLIT, $0-0
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Get R0
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Get R1
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I64Eq
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If
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I64Const $1
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Return
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End
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loop:
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Loop
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Get R2
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I64Eqz
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If
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I64Const $1
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Return
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End
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Get R0
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I32WrapI64
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I64Load8U $0
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Get R1
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I32WrapI64
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I64Load8U $0
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I64Ne
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If
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I64Const $0
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Return
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End
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Get R0
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I64Const $1
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I64Add
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Set R0
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Get R1
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I64Const $1
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I64Add
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Set R1
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Get R2
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I64Const $1
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I64Sub
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Set R2
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Br loop
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End
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UNDEF
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